第4.0次Java作业

package hh;
class ElectricCharge
{
    private double lastnum,thisnum;
    public ElectricCharge() 
    {
        
    }
    public ElectricCharge(double lastnum, double thisnum)
    {
        this.lastnum = lastnum;
        this.thisnum = thisnum;
    }
    public double getLastnum() 
    {
        return lastnum;
    }
    public void setLastnum(double lastnum)
    {
        this.lastnum = lastnum;
    }
    public double getThisnum()
    {
        return thisnum;
    }
    public void setThisnum(double thisnum)
    {
        this.thisnum = thisnum;
    }
    public void PrintMessage()
    {
        System.out.println("上月用电为："+lastnum+"    本月用电为："+thisnum);
    }

}
public class TestEC
{
    public static void main(String[] args) 
    {
        ElectricCharge ec1=new ElectricCharge();
        ec1.setLastnum(1000);
        ec1.setThisnum(1200);
        System.out.println("用户一家的用电情况为：");
        ec1.PrintMessage();
        System.out.println("本月电费为："+ec1.getThisnum()*1.2);
        System.out.println();
        
        ElectricCharge ec2=new ElectricCharge(1200,1450);
        ec2.setThisnum(1500);
        System.out.println("用户二家的用电情况为：");
        ec2.PrintMessage();
        System.out.println("本月电费为："+ec2.getThisnum()*1.2);
        
        
    }
}

　　只为了作业